/// <summary>
/// Does in-place AND NOT of the bits provided by the
/// iterator.
/// </summary>
public void AndNot(DocIdSetIterator iter)
{
if (iter is OpenBitSetIterator && iter.DocID == -1)
{
OpenBitSetIterator obs = (OpenBitSetIterator)iter;
AndNot(obs.arr, obs.words);
// advance after last doc that would be accepted if standard
// iteration is used (to exhaust it):
obs.Advance(numBits);
}
else if (iter is FixedBitSetIterator && iter.DocID == -1)
{
FixedBitSetIterator fbs = (FixedBitSetIterator)iter;
AndNot(fbs.bits, fbs.numWords);
// advance after last doc that would be accepted if standard
// iteration is used (to exhaust it):
fbs.Advance(numBits);
}
else
{
int doc;
while ((doc = iter.NextDoc()) < numBits)
{
Clear(doc);
}
}
}
/// <summary>
/// Does in-place AND of the bits provided by the
/// iterator.
/// </summary>
public void And(DocIdSetIterator iter)
{
if (iter is OpenBitSetIterator && iter.DocID == -1)
{
OpenBitSetIterator obs = (OpenBitSetIterator)iter;
And(obs.arr, obs.words);
// advance after last doc that would be accepted if standard
// iteration is used (to exhaust it):
obs.Advance(numBits);
}
else if (iter is FixedBitSetIterator && iter.DocID == -1)
{
FixedBitSetIterator fbs = (FixedBitSetIterator)iter;
And(fbs.bits, fbs.numWords);
// advance after last doc that would be accepted if standard
// iteration is used (to exhaust it):
fbs.Advance(numBits);
}
else
{
if (numBits == 0)
{
return;
}
int disiDoc, bitSetDoc = NextSetBit(0);
while (bitSetDoc != -1 && (disiDoc = iter.Advance(bitSetDoc)) < numBits)
{
Clear(bitSetDoc, disiDoc);
disiDoc++;
bitSetDoc = (disiDoc < numBits) ? NextSetBit(disiDoc) : -1;
}
if (bitSetDoc != -1)
{
Clear(bitSetDoc, numBits);
}
}
}